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May fall under Obliviously Evil.
More obviously, brainwashed.
Link to TRS threads in project mode here.
Yes, but the specific instance of the brainwashed people doing what they perceive to be right.
No, mtmc is "despair, trickery, lies, and sometimes even carefully-selected truths, that are thrown in that successfully break the victim's spirit." It's notable for not being vulnerable to any sort of "dispel" effect, which would end the situation described by the OP.
Link to TRS threads in project mode here.
Yes, basically putting the brainwashed people into a Screw the Rules, I'm Doing What's Right! mentality from their perspective, but this perspective is entirely fictional and provided by the villain so that they'll be more motivated than drones robotically carrying out instructions or people in a haze (as with the Imperius curse) or getting around any kind of "won't do what they're viscerally opposed to" restriction.
For instance, an otherwise honest accountant embezzling money so he can pay for his daughter's experimental surgery, except he doesn't have a daughter, the villain gave him Fake Memories while posing as the surgeon. Or a squad of soldiers who assassinate a politician, because they've been brainwashed to think they've been sent back in time to kill Hitler, and a POV scene shows bodyguards in Nazi uniforms and the target as, well, Hitler.
Seconding Obliviously Evil. Might also fall under Tomato in the Mirror. There might be something in the Face–Monster Turn page that fits too.
they/them || "Forgive me, regent of queer amphibians" - Lt.BGob
A trope where a villain with mind control powers makes his victims think they're doing the right thing, as seen from their point of view.
For example, bank employees are brainwashed into committing a heist. When we see it from their point of view, it turns out they think they're stealing drug money from a crimelord.
Or the villain is one of those creepy-little-girl-with-psychic-powers whose only goal in life is to kill people, but her victims see her as an innocent little girl targeted by the global conspiracy responsible for giving her powers in the first place, and thus fight to the death to protect her.
One Batman Beyond villain brainwashes people into committing crimes for him but the victim is completely unaware of what they're doing (from one man's point of view, he's carrying a wounded soldier into a medevac helicopter instead of stolen goods, from another's he's participating in a game show stuffing the most objects into a sack instead of looting a shelf).